On Thursday bomb attacks by insurgent and separatist Baluch groups in the Pakistani cities of Quetta and Mingora killed at least 115 people. Among the dead in Quetta was Irfan Ali, a prominent human rights activist.

Shortly after the first bomb struck a local snooker hall, Ali tweeted that he had narrowly escaped harm. When the second bomb exploded, timed to hit rescue workers who had arrived on the scene, Ali was killed as he helped those injured by the first blast.

Ali’s death sparked an outpouring of grief and anger, as well as tributes to a life supporting human rights causes, across Twitter and the Internet.